LVLP series Linear Power Supplies are DC Power Supplies that achieve AC/DC conversion through power frequency transformers and transistor loop control. Compared with switching DC power supplies, linear mode power supplies have higher stability, higher accuracy, and lower output ripple. And the most important, because of the use of the power frequency AC/DC conversion principle, the linear power supply does not have high-frequency radiation interference, and is especially suitable for use in places with restrictions on EMC and EMI.
The LVLP series linear AC - DC power supplies have a wide range of output specifications, the output power ranges from 1KW to 400KW, and the output voltage can reach up to 800VDC, and accept customization.
Linear DC Power Supplies, Linear AC - DC Power Supplies, DC Linear Power Supplies, AC - DC Linear Power Supplies, Linear AC DC Supplies Yangzhou IdealTek Electronics Co., Ltd. , https://www.idealtekpower.com
The whole series DC linear power supply adopts industrial-grade metal chassis, pure copper AC/DC varnished transformer, high-reliability multi-transistor filter loop, ensuring the power supplies can run for a long time at full load with high stability, high accuracy, and ultra-low ripple electronic characteristics, equipped with a complete protection circuit, which can better ensure the reliability of the linear power supply itself and the safety of the customer's load.
The output voltage and current can be adjusted by the 10-turn potentiometer with scale and lock on the front, equipped with 4 1/2-digit high-resolution LED meters for output value reading, and RS communication interface can also be added for remote control and monitoring of linear power supplies.
This series of linear power supplies are mainly used for aging and testing of components such as capacitors, relays, and resistors, and can also be used for experimental testing of electronic components such as thermistors and motors. At present, many well-known capacitor manufacturers, resistor factories and other electronic component production units and scientific colleges and universities and other research and development units use this series of power supplies, and they have all been highly praised.
In today's automotive industry, the demand for improved fuel efficiency and environmental protection is becoming increasingly strict. To meet these growing challenges, automakers are turning to innovative technologies that can help reduce energy consumption, emissions, and overall vehicle weight. For traditional vehicles, using cleaner fuels, lightweight materials, improving engine and drive system efficiency, and reducing aerodynamic drag have proven to be some of the most effective methods. These strategies are not only key to energy savings but also a major focus of ongoing research in automotive technology. As new energy vehicles continue to gain traction, all-aluminum body designs have become a standard in the industry, drawing attention from car manufacturers.
Despite this shift, the internal combustion engine remains the dominant power source for the next 30 years. After the widespread adoption of turbocharging, the industry is now looking for new technologies to further enhance the performance of traditional engines. Recently, Delphi, in collaboration with scientists from Silicon Valley-based Tula, introduced a groundbreaking innovation called "Dynamic Skip Fire" (DSF) technology — a revolutionary approach to improving the efficiency of traditional automotive power systems.
Hu Nan, General Manager of the Gasoline Engine Management System at Delphi Powertrain for the Asia-Pacific region, emphasized the importance of DSF in an interview with Gasshi Automotive. He stated, “The internal combustion engine will still dominate the automotive market for the next three decades. DSF is a strategic initiative from Delphi’s headquarters to China. We aim to promote this technology in the Chinese market to help customers meet the stringent fuel consumption regulations and develop vehicles that comply with the latest national standards.â€
Currently, over 30% of vehicles sold in China are SUVs, and more than 60% of these use engines larger than 1.6L. Hu explained that this trend reflects consumer preferences for larger vehicles with strong engine performance. DSF technology offers a solution by allowing large-displacement engines to operate more efficiently without compromising power. It enables dynamic cylinder deactivation, which means the engine can function like a smaller unit while maintaining the performance of a larger one.
DSF, or Dynamic Skip Fire, is the first fully variable cylinder deactivation technology in the industry. It can be applied to both multi-cylinder and four-cylinder engines. According to testing data, a four-cylinder engine equipped with DSF can save between 6% and 8% in fuel consumption under different driving conditions, significantly improving fuel economy. Additionally, COâ‚‚ emissions can be reduced by at least 50%, and engine responsiveness is enhanced.
Unlike traditional cylinder deactivation methods, DSF provides real-time control. Traditional systems rely on fixed operating conditions, whereas DSF dynamically adjusts based on the vehicle’s needs. This allows for more precise torque delivery, minimizing power loss and unnecessary fuel consumption.
For example, if a vehicle requires 20 Nm of torque at low speeds, traditional systems may either underperform or oversupply power. In contrast, DSF calculates the exact torque demand and adjusts the number of active cylinders accordingly, ensuring smooth and efficient operation.
The DSF system determines which cylinders to ignite in real time, optimizing valve timing, throttle position, and ignition strategy. The choice of cylinders to deactivate is also based on avoiding engine resonance and ensuring optimal performance.
By controlling which cylinders fire during each cycle, DSF pushes cylinder deactivation to its theoretical limits. Future applications could include managing exhaust gas oxygen levels, improving Miller cycle efficiency, and even enabling advanced combustion techniques such as gasoline compression ignition.
A prototype of a 1.8L four-cylinder Volkswagen Jetta equipped with DSF was demonstrated at the Aachen Colloquium in Germany in 2016. During a test drive, the DSF system operated so smoothly that drivers barely noticed the cylinder deactivation process, offering improved comfort and reduced noise.
Two main components are involved in DSF technology: the fuel-saving control valve, which acts as the system controller, and the rocker arm, which physically closes the valves. When hydraulic pressure is applied, the lock pin opens, allowing the rocker arm to move freely and prevent the valve from opening. When the pressure is released, the spring resets the lock pin, and the valve reopens.
This dynamic control allows the engine to adjust its operation based on real-time torque demands, resulting in better fuel efficiency and performance. DSF has been successfully implemented across various powertrain configurations, making it a versatile solution for modern engines.
When combined with other Delphi technologies, such as the 48V mild hybrid system, DSF can deliver even greater benefits. The 48V system alone can reduce COâ‚‚ emissions and fuel consumption by over 10%, and when paired with DSF, the reduction can reach up to 20%. Xu Xiangdong, Engineering Director for Delphi Powertrain Systems in the Asia-Pacific region, noted, “DSF is an innovative upgrade to traditional internal combustion engines. When integrated with 48V technology, the two systems work together to produce a 1+1>2 effect. We provide customized solutions depending on the specific needs of our customers.â€
While turbocharging focuses on boosting power in small engines, DSF helps larger engines achieve dynamic miniaturization. These two technologies complement each other, addressing different market segments without replacing one another.
Looking ahead, Delphi aims to launch mass production projects for DSF technology in 2020, aligning with China’s new fuel consumption regulations for passenger cars. The company is working closely with OEMs to ensure compliance and support the transition to more efficient, environmentally friendly vehicles.